I don't get the only metric thing. I agree I use it the most, but not always. Almost everything I work on is domestic, though. Just did struts, tie-rods, end links, and brakes on a '10 Caddy DTS tonight. Used 9/16 and 5/8 a bunch. Strut and ball joint tools are 3/4 or 7/8. My Jeep is mixed...